Electric horn.



G. M. WILLIS.

ELEGTRIG HORN.

APPLICATION FILED JUNE 20, 1913.-

1,G76,181 Patented 0011.21,].913.

Zdflnesaea: lhvantar UNITED STATES PATENT GFFICE.

GEORGE I. WILLIS, OF CHICAGO, ILLINOIS.

ELECTRIC HORN.

Specification of Letters. Patent.

Patented Got. 21, 1913.

Application filed June 20, 1913. Serial No. 774,749.

To all whom it may concern:

Be it known that I, Gnome M. WILLIS, a citizen of the United States, residing at Chicago, in the countyof Cook'and State of- Illinois, have invented acertain new and useful Improvement in Electric. Horns, of

which the following is a full, clear, concise,

be readily incorporated m direct current horns. p

The object of my invention is to produce a device of the class mentioned which is simple in construction, eficient in 0 eration and one which may be economica ly manufactured.

The horn herein described and subsequently claimed is designed to be constructed almost entirely of sheet metal and the various parts of the horn are so arranged that after the various parts are assembled the armatureformin a part of the device is non-adjustable. T is 15 a desirable feature inasmuch as a device of this class which isto be sold at a comparatively low price must not be subject to tampering and the consequent derangement if the same is to give satisfactory service.

My invention is more fully set forth in the following description and is illustrated in the accompanying drawings in which Figure 1 is a, longitudinal sectional view of the horn of my invention, and Fig. 2 is a fragmentary sectional View taken on the line 22 of Fig. 1.

Similar reference numerals refer to similar parts throughout.-

In the drawings I have shown the usual. amplifier at 3, which projects into a diadishshaped corrugated sheet metal members 4 and 5 which have their annular flanges 6 secured together by rivets 7. Disposed between the dish-shaped sheet metal members 4 and 5 and secured by'means of rivets 7 is a sounding diaphragm 8. By making the dish-shaped members 4 and 5 of sheet metal and corrugating the same as shown, I am able to'secure a rigid structure,

at the same time using a minimum amount phragmchamber which is formed by two of materials in the construction of my horn. It is desirable to have the diaphragm chamber comparatively large, as shown in the drawings, in order to secure a mellow tone. Horns of the general type to which the present invention relates have in the past been subject to objection because of the shrill and oftentimes harsh sound produced by the horn, and this has usually been due to the fact that the diaphragm chambers have been too shallow and of the wron shape.

Dis osed behind the soun ing diaphragm and isposed coaxially therewith is a flat spring or spring diaphragm 9, which is secured to the dish-shaped member 5 by means of rivets 10, these rivets alsoserving to support a coil housing 11 which is disposed against the back of the dish-shaped member 5. It will readily be seen that when the parts are assembled as shown in,v

the drawings and the rivets 7 and 10 are in .position, it is practically impossible to "gain access to the interior of 'the horn without ruining the same.

Secured to the back of the coil housing 11- by means of a rivet or other suitable fastens ing means shown at 12, and disposedwithin said housing, is a magnet 13 which receives its operating energy through conductors 14 having electrical connection with terminals 15 carried by the-outside of the housing 11. The terminals 15 are, of course, intended to be connected with any suitable source of alternatin current in a manner well known to those s 'lled in the art.

- The flat spring or spring diaphragm 9 is provided with a central opening through which projects a bolt 16 which is riveted in position, as shown. Threaded upon the rear portion of this bolt 16 is a relatively large armature 17 disposed in close proximity to the magnet 13, this armature being secured at the desired position by means ofa locking nut 18. p

The sounding diaphragm 8 is provided with a central opening into which 1s r veted a rin 19, as shown. The bolt 16 earned by the at spring or spring diaphragm 9 s provided with a head 20, into which. 11s

threaded a screw 21, this screw extending ment with the ring 19 when the armature-17 broadly any equivalents thereof which may suggest themselves to those sln'lled 1n the 10 art.

What I claim and desire to :secureby the spring through sa d opening, said screw being pro- Letters Patent is:

1.:An electric horn comprising a casing,

a sounding diaphragm, asprin diaphragm disposed behind the sounding 'aphragm, a

magnet disposed behind the sounding diaphragm an armature connected with the spring iaphragm arranged to be actuated by the magnet, a central opening in; said sounding dia hragm, and an impact mem-.

. I ber eonnecte with the spring diaphragm passin provi ed wit a portion normallyout- .of

engagement with the sounding diaphragm but arranged to engage the same when the armature is actuated. I

2. .Anelectric horn comprising asound ing diaphragm, a magnet, an armature, a

' spring tending to hold said armature out of itsattracted position, a hole in said sounding diaphragm, and an impact memberme .chanically connected, with the armature ex? tending freely through said opening, said impact member comprising a portion normally out of engagement with the sounding I diaphragm but arranged to strike the same when the armature is actuated.

ing diaphra spring diap freel through said openlng and SQA n'electric horn-comprising a sounda s ring diaphragm, said vide'd with ahead normally-out of engagement with the sounding diaphragm but arranged to strike the same when the armature is attracted.

4. An electric horn comprising a casing, a

sounding diaphragm, a spring d1aphragm,a

magnet disposed behind the spring diaphragm, an armature carried by the spring diaphragm and the spring diaphragm alone, arranged to be attracted by said magnet,

a central opening in said sounding diaphragm, and an impact member'carried by thespring diaphragm extending freely member being providedwith a, portion normally out of engagement with the sounding diaphragm but arranged to strike the same when the armature is attracted.

In witness whereof, I hereunto subscribe iny name this 16th day of June, A. D, 1913.

GEORGE M. WILLIS. Witnesses:

ALBERT G. MOCALEB, AUeUs'r H. Annn'r.

ragm" eing disposed behind said sounding diaphragm, a magnet 'dis-.

through said central opening, said impact 

